Physical allocation

Le résumé fourni par la source

According to the ISO standards, all types of allocation should be avoided. Allocation excludes the parts of the product system that are related to the co-products, the fate of the excess production of by-products, and the decrease in the marginal supply to the markets that the by-products supply. At the same time, it assumes that an increase in demand for the by-products will stimulate an increase in output from the co-producing activity, an increase that cannot occur in reality. Physical allocation thus results in a biased model of the market reactions in the product system, in addition to the violation of monetary conservation principles. We give five examples of physical allocation. Despite its wide use in attributional LCA, its application generates uncertain results and does not contribute to the more representative modelling of systems. It cannot support robust decisions and thus its use should be minimised.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.